artificial groundwater recharging techniques

Artificial Groundwater Recharging Techniques

BySaisrinivas GorugantulaPraneeth Chiravuri

What is groundwater recharging? It is hydrological process where water moves downward from the

surface water to groundwater. Recharge is the primary method that water enters an aquifer.

Location ofsites for artificial recharge

• (1) Water (availability, source, turbidity, quality, etc . )• (2) surface soils• (3) depth to aquifer• (4) geologic structure and capacity of the ground-water reservoir• (5) the presence of aquicludes• (6) movement of ground water• (7) location of withdrawal area

Basin Spreading Recharge A series of small basins for impounding water throughout the

intake area.

Ditch and furrows a series of shallow, flat-bottomed furrows or ditches, closely spaced,

and on a low grade, to spread water throughout the intake area.

• Recharge wells are of two typesa)Injection well, where water is pumped in for recharge andb)Recharge wells where water flows under gravity.

Recharge wells

Injection well

• One effective system for recharge consists of drilling injection wells into the aquifer downstream from a dam. Water is then conducted from the principal spillway to the wells.

Recharge well

• In some cases, wells that normally are pumped during the growing season are used for recharge during other seasons.

RTRWH in Shram Shakti Bhawan, New Delhi

Benefits of Artificial RechargeSchemes

To maximize storage(long-term & seasonal) Water quality improvement through dilution Preventing saline-water intrusion & land subsidence Reducing reduction volumes from river f low Controlling effects of climate change Maintaining declining ground water levels

Thank you